Rotary motor.



PATENTBD AUG. 21, 1906.

A. PRIMAT.

ROTARY MOTOR.

APPLICATION FILED NOV.17, 1904.

3 SHEETS-SHEET 1 //w//v r0? X fizewandz'clizhzat A rrofiwim PATBNTEDAUG. 21, 1906.

A. PRIMAT.

ROTARY MOTOR.

APPLIGATION FiLBD NOV. 17. 1904.

3 SHEETS-$113111 2.

No. 829,231, PATENTED AUG. 21, 1906 v A. PRIMAT.

ROTARY MOTOR.

APPLIUATION FILED NOV. 17, 1904.

3 SHEETS-SHEET 3 IHHIIIIHII serum OFFICE.

ALEXANDRE PRIMAT. 0F PARIS, FRANCE.

ROTARY MOTOR.

Specification of Letters Patent. Application fled November 17,

Patented Aug. 21, 1906. 1994. Serial llo. 888.110.

To all whom it may concern:

Be it known that I, ALEXANDRE Pnnm'r, formerly glover, actually motormanufacturer, of 103 Rue Lafayette, in the city of Paris, Republic ofFrance, have invented mprovements Relating to Rotary Motors, of whichthe following is a full, clear, and exact description.

This invention has for its ob'ect a rotary motor operating, for example,y means of petroleum s int or of alcohol and characterized b t ecombination of four rigidlyconneet pistons coupled in pairs by means ofarms and cross-pieces in such a manner that all four are able to rockaround a central point, moving in cylinders arranged circularly in thecasing of the motor, cast in a single piece, this rocking movement beingconverted into a continuous circular movement by means of apeculiarly-arranged connesting-rod and crank, while the explosivemixture is conducted alternately into each of the four cylinders in sucha manner that an explosion takes lace for each reciprocatory movement,whilg the suction, compression, and the exhaust of the burnt gases takeplace alternate] in each of the other cylinders, owing to t e provisionof a set of valves ap ropristely arranged and operated.

iis invention is hereinafter described with reference to theaccompanying drawings, illustrating a four-cycle motor, m whichdraWings- Figure 1 represents this motor in vertical section along theaxis. Fig. 2 is a plan view of the motor. Fig. 3 is a vertical sectionthrough the motor on the line A A of Fig. 1. Fig. 4 illustrates amodification of the said motor, and Fig. 5 is a section through theexhaust valves.

In these figures similar characters of reference are employed todesignate like parts.

As shown in the drawings, this motor comprises an annular envelop orcasing 11, cast in one piece and in which cylinders b b b are formed ingroups of two,scparatcd by means of a partition 0, forming a commoncylinder end, while two diametrically opposite reccsses rt (3 separatethe two groups. A wetor-jacket csurroumls those cylinders in order toinsure their proper coo log. 0, Figs. 1 and 5, indicates thecxlmustmrts. Admission-ports are rovidod on tie up msite sides of thecylim (us. In the centre por tum of the annular casing iso cross-piorcf,

at the center of which is mounted a horizonl to! shaft 5', arran ed insuch a. manner as to remain fixed an receive two arms h, connected onewith the other by means of bolts. These arms, adapted to osci latefreely upon the shaft g, are provided with cross-pieces t 1', connectingthe pairs ofpistons 7" 7 7" j rigidly. The assemblage composed by thearms h k and the cross-pieces i i constitutes a beam. The lowercross-piece 1" receives, by means of an articulation k, a connectingrodl, embracing by the other extremity a crankin m, with counte ise m,forming part 0 the driving-shaft m ranged in a sleeve n, receives at oneend the pulley fly-wheel o and at the other end a starting-crank p andtwo heiicoidal gearwhcels arranged in an intermediate position. seegear-wheels act u on other helicoidal gear-wheels r, r id wit the shaft8 in order to transmit tieir movement to these latter and displace thecams t, with which these shafts are provided. The cams t suitablyregulated, control, by means of the rode it o, the lip of thesuction-valves x and exhaust-valves 3 arranged on the sides of theenvelop and communicating with the interior of the cylinders by means ofthe admission and exhaust ports before referred to. Spiral springs zmaintain the valve-rods constantly no contact with the cams t and insuretheirclosing.

The operation of my improved motor is as follows: Assuming, for example,that the explosion takes place on the piston the opposite piston of thesame pair w compress the explosive mixture during this time while thepiston j" of the second pair will suck the fresh mixture, and the piston7" will expel the burnt gas of the preceding explosion, and so on insuccession alternately. Considering each of the pistons separately wetherefore have, first, suction by forwar displacement of the piston;second, compression of the mixture by return movement of the piston;third, work effected by forward movement of the piston under the actionof the explosion; fourth, exhaust b return movement of the )istonimmediate y before the admission of the fresh mixture.

The forms, details, accessories, materials, and dimensions of thisnull-or may of course vary without thereby altering in any way theprinciple of the invention. Thus, for oxmnplo, as shown in Fig. 4, thedrivingslmlt l, with pulley lly-whcol 2, might be arranged ull.l|oooutor of the motor, upon This shaft, an.

for driving the cam-shafts which the beam would be mounted loosely. Thisshaft in this case is dispiaceable and is rovided with two cranks 3 andtwo connectmg-rods 4, upon which act the cranks 5, forming part of theintermediate shaft m', receiving the movement of the connectingrod 1, asabovestated. The shafts s for operating the valves are provided asbefore like- W150.

This motor may be operated by steam compressed air, or gas, the requireddetaii cha s of course being made.

I c aim- I 1. In an engine, the combination of a curved cylinder, apiston operating therein, a rocking member to which the piston isconnected, a crank-shaft located at one side of said rocking member, aconnection between the rockin member and crank-shaft, a valve at eachside of the said c linder, means for operating said valves, suc meansincluding a cam-shaft for each valve, the cam-shafts extending acrossthe crank-shaft, and gearing from the crankshaft 2. In an engine thecombination of a curved cylinder, a frame on which the same is mounted,a piston operating in the cylinder, :1 crank-shaft mounted in the frame,a connection between the iston and crank- 3c shaft, a valve at each si eof the c linder, means for operating the valves, sai means comprising acam-shaft for each valve, the cam-shafts bein located at the respectivesides of the cylin er and extending access the 3 5 crank-shaft, andgearin for driving the camshafts from the crank-s aft.

3. In an engine, the combination of a curved cylinder, a pistonoperating therein, a crank-shaft having its crank intermediate its 40ends, a connection between the iston and crank-shaft, a valve at eachside 0 the cylinder, means for o crating the valves, comprising acam-she t for each valve, the camshafts being located at the respectivesides of the cylinder and at op iosite sides of the crank-shaft, andgearin ior driving the camshafts from the crank-s aft.

The foregoing specification of my improvements relating to rotary motorssigned by 5o me this 2d day of November, 1904.

ALEXANDRE PRIMAT.

Witnesses:

Ancnmann R. BAKER, MAURICE U. PIGNET.

